Perforating apparatus for telegraphic strips.



E. BELIN.

PBRPOBAHNG APPARATUS PGR TBLBGRAPHIC STRIPS.

APPLICATION FILED 13120.20, 1911.

Patented June 3, 1913.

ik .2. @eases y 6.1m /V/eelf if jhm viz/W UNITED STATES PATENT OFFICE.

EDOUARD BELIN, 0F PARIS, FRANCE.

PERFORATING .APPARATUS FOR TELEGRAPHIC STRIPS.

Specification of Letters Patent.

Patented Juno 3, 1913.

Original application filed April 25, 1911, Serial No. 623,328. Divided and this application filed December Serial No. 666,915.

To all whom t may concern:

Be it known that I, EDOUARD BnLiN, a citizen of the Republic of France, residing at laris, in the Republic of France,have invented certain new and useful Improvements in Perforating Apparatus for T elegraphic Strips, of which the following is a specification.

This invention relates to perforating apparatus for making perforated tapes or bands for use in transmitting telegraphic messages. The apparatus is more particularly designed for use in connection with the teletype andtachytelegraph machines described in patent application, Serial No. (323,328, filed 25th April 1911, from which the present application is a division. p

In most telegraphic apparatus using automatic transmission by means of a perforated band or tape each letter is symbolized by a series of successive impulses and the different letters and characters are distinguished from each other by the different combinations of positive or negative, short or long, signals.

In the prior application above referred to is described an apparatusl which only requires for sending any character whatever the emission of a single current impulse and only requires for each character a number of perforations on a straight line at rightangles to the edge of the tape and therefore only necessitates a movement of the band corresponding to the length of a single perforation after each character has been sent. It is in connection with such apparatus that the perforator which forms the subject matter of the present application was designed although the invention may be applied to other forms of teletype and tachytelegraph machines.

The band is perforated either directly by the action of the keyboard of. the composing machine as fast as the composition is done, or by the action of a typewriting machine resembling the ordinary typewriter. It is this advantage which enables in dactylography thc correction of the text represented by the perforations to be retained either on the tape itself or on a detachable block or countcrfoil.

In the case of a teletype machine which is required to transmit the text of newspapers' the transmission of the characters special keys for synchronism and for changes of alphabet. As will be 'seen hereinafter these perforate in a different manner from the character keys.

- The method of construction and of operation will be described in connection with the accompanying drawings, in which :d

Figure l is a diagrammatic View of the Iiierforator and the parts connected with it; Fig. 2 isan elevation of one of these parts called the electroniagnet of polarity.

Each character is transmitted by means of three identical perforations distributed on the same straight line .fr w at i'iglitaiigles to the direction in which the tape 1 is moved.

'l'hese three perforations arc:-one for ser.

looting the potential of the current; one for selecting a suitable resistance to be added to the line; one for selecting the direction of the current.

The perforations are made by the depression of a punch 2 fixed at the end of an armature 3 of an electromagnct, which sufliciently powerful to pcrforate without hesitation the paper moved past it, The holes are preferably square, but this is not obligatory. The paper is drawn forward by two pressure rollers 5 and guided by a series of parallel rollers G. It is held under the line ai of the punches 2 by a very smooth plate 7. Holes 8 arc'formed in this plate 7 beneath each punch 2 in order to allow the latter to operate freely.

The three necessary perforations arc produced simultaneously by the single depression of the corresponding key of the keyboard of the composing machine. After the whole of the perforations have been each time made, the paper advances to the extent of one division.

In the perforator there are eighteen identical electromagncts A, B, C, D, E, distributed in two semicircles, so that all the extremities of the armatures where the punches are, are side by side on the same straight line It is between these two half rings that the tape or band enters and emerges. Each electi'oinagnet is electrically connected with a certain number of keys a, b, c, each of which latter on being depressed closes three circuits a, a2, b, b2, c', ci'. The eighteen electroinagncts are distributed in the following Wayz`two for Selecting the direction of the current, A; nine for selecting the `neously. v The end of the armature 3 of the electroL.

circuit g, g2,- of

potential, Bf five for Selecting the additional resistafnces, C; one for synchronism, D; one for changing the alphabet, l). 'IIhey are all connected to the same source of current- F.

Yhen the armature of one or other of the polarizing electromagnets A is lowered, its prolongation closes the fourth circuit g', g2, the ultimate Opening of which causes the band or tape to advance. Under each longitudinal row of keys of the keyboard, a. band of copper 10 is fixed and all these bands are connected in series in succession to one another. One of the ends of this Series is free, the other is connected with one of the poles of the local source of current F. A contact spring 9 which rises simultaneously with the key is fixed to this copper band and .beneath each key. The flexible extremities of three wires atb, c', each connected with their corresponding electro- -magnets and insulated from one another,

abut beneath these contact springs. `Consequently, when a key is depressed, the three electromagnets selected are placed in circuit by the contact 9-connected with a common terminal, the three armatures 3 areloweried and the three holes areperforated simulta-i magnetvA forselecting the direction of the current (Fig. 2) loses, whenlowered, the another electromagnet 11, the armature'of which has a pawl 12 bearing on a toothed wheel 13 fixed to the shaft of one of the drawing rollers 5. This arma.- ture vis thus lowered simultaneously with the key of the keyboard and the pawl 12 engages beneath a tooth on the wheel 13. When the operator ceases t0 depress the key, the polarity electromagnet A no longer acts and its armature 3 no longer-closes thefcircuit g', g2t of the last named electromagnet 11, the armature of which in rising' to its position of repose takes with it the pawl 12. The toothed wheel 13 thus. advances to the extent of one divisiontaking with it the band of paper'l which is then ready for another perforation. At the other lend of the shaft where the toothed wheel is placed. a small ratchet" wheel is fixed, the object of which is to prevent the retrogrademovement of the tape. I

After a certain number of pcrforations, 500 for instance, a bell' similar to that ot cial electro-magnets, two i e keys and electro-magnets,

1. In a tape perforating machine the combination of a plurality of punches, a plurality of signaling electro-magnets in operative connection therewith, electrical tape feeding means, aA source of electrical energy, a circuit including said tape and feeding means and said source, and a contact in said circuit adapted to be closed by t-he armature of one of the signaling electro-magnets after each perforating operation. l

2. .In a tape Vperforating machine, the combination cfa' plurality of characters, electromagnets, character punches'operated by said electro-magnets, and having their ends arranged-in a straight line at .right-angles-to the edge of the tape, akeyboard, character keys thereon, circuits in connection with said so .that each key closes .a plurality of said circuits, two speerated thereby and adapted tomake perforations distinct from each. other and from those. of the characterpunches, circuits in connection with said special electro-magnets and two keys on said keyboard each adapted to close the circuit of one of said special electro-magnets alone.

3. In a tape perforatingmachine, the combination of a pluralityof signaling electro magnets, a plurality of punches in operative connection therewith, a plurality of keys each adapted to energize three of said electro-magnets, a tape feeding electro-magnet and a contact in the circuit of said tape feeding electro-magnet and. adapted to be closed by the armature of one of the three electromagnets energized upon'each depression of dne of said keys.

, In witness whereof, I have hereunto signed my name this 7 lday of November, 1911, in the presence of two subscribing witnesses.

AN'roNiN Mrm'rnrrun'r, H. C. Coxn.

A special hole is then perforated special punches op. 

